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单选题
A tow bridle is attached to the main tow hawser at the（）.
A
bight ring
B
tow hook
C
fishplate
D
swivel
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One advantage of chain over wire rope for a tow bridle is that chain ______.A.is better suited for inland towingB.resists damage from chafingC.handles more easilyD.equalizes towing forces better
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Before leaving port on an ocean tow，a tug captain should assure himself of all the following EXCEPT ______.A.the towing hawser can be released quickly in an emergencyB.the correct navigation lights are rigged and operable on the tug and towC.an insurance underwriter has prepared a pre-sailing surveyD.a pick-up wire has been rigged on the tow in case of a breakaway.
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A tug is "in irons" when held in a fixed position by ______.A.the weight of its tow，its being anchored，or groundedB.the weight of its towing hawser on the bottomC.an adverse currentD.lack of power or an engine breakdown
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A chain bridle is preferable to a wire rope towing bridle on a long ocean tow because chain ______.A.is more flexible and has the ability to absorb shock because of its weightB.is less subject to wear and damage from abrasionC.requires little maintenanceD.All of the above
考题
With a large tow astern，there is immediate danger to the tug in the event of the ______．A.Tug losing powerB.Tow line partingC.Bridle twistingD.Tow broaching
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The choice of length of tow bridle legs is governed by the ______．A.Expected towing forcesB.Capability of retrieving gearC.Freeboard of the unit being towedD.Need to reduce yaw
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A tow astern is veering from side to side on its towline．The best way of controlling the action is to ______．A.Trim the tow by the bowB.Trim the tow by the sternC.List the tow to windwardD.Adjust the length of the towing bridle
考题
A chain bridle is used when towing astern because it ______.A.is easy to connectB.provides an effective catenary and absorbs shock due to its weightC.makes rigging a swivel unnecessaryD.prevents the tow from yawing by the drag of the chains in a seaway
考题
单选题One advantage of chain over wire rope for a tow bridle is that chain（）.A
is better suited for inland towingB
resists damage from chafingC
handles more easilyD
equalizes towing forces better
考题
单选题A tug is “in irons” when held in a fixed position by（）A
the weight of its tow，its being anchored，or groundedB
the weight of its towing hawser on the bottomC
an adverse currentD
lack of power or an engine breakdown
考题
单选题The choice of length of tow bridle legs is governed by the（）.A
expected towing forcesB
capability of retrieving gearC
freeboard of the unit being towedD
need to reduce yaw
考题
单选题What is the purpose of the intermediate spring?（）A
Serves as a backup for the main tow hawser in case of failureB
Provides weight and flexibility to the total tow makeupC
Lengthens the main tow hawser to keep the tow in stepD
Distributes the towing load
考题
单选题In astern towing，a tow span，also called the tow bar or towing arch，is used to（）.A
insure that the hawser leads directly aft as it passes over the stern of the towing vesselB
increase the stability of the towing vessel by raising the hawser off the deckC
reduce chafing of the towing hawserD
prevent fouling of the hawser on deck gear located on the stern of the towing vessel
考题
单选题On a long ocean tow，the bridle should be made up of two equal lengths of（）.A
chainB
wireC
nylonD
manila
考题
单选题A chain bridle is used when towing astern because it（）.A
is easy to connectB
provides an effective catenary and absorbs shock due to its weightC
makes rigging a swivel unnecessaryD
prevents the tow from yawing by the drag of the chains in a seaway
考题
单选题The MINIMUM acceptable size for a towing bridle would be that size in which the safe working load (SWL) of each leg of the bridle is equal to（）.A
one-half the SWL of the main towing hawserB
three-fourths the SWL of the main towing hawserC
that of the main towing hawserD
twice that of the main towing hawser
考题
单选题Which statement is TRUE concerning hawser towing? （）A
The catenary in a hawser should be sufficient so that the hawser just touches the bottomB
The hawser is of sufficient length for towing when taut between tug and towC
Increasing speed usually increases the catenary in the hawserD
Shortening the tow hawser generally decreases the maneuverability of the tug
考题
单选题When connecting the tow bridle to a tug, the end of the bridle is passed with a（）.A
heaving lineB
shot lineC
high lineD
messenger line
考题
单选题When towing astern，one way to reduce yawing of the tow is to（）.A
trim the tow by the sternB
trim the tow by the headC
have the tow on an even keelD
list the tow on the side it is yawing
考题
单选题In towing，heaving lines are used for（）.A
passing a tow bridle to the tugB
passing a messenger lineC
heaving in the tow bridleD
service lines with rocket line throwers
考题
单选题A tow bridle is attached to the main tow hawser at the（）.A
bight ringB
tow hookC
fishplateD
swivel
考题
单选题If a vessel under tow starts jumping on its tow line，the most appropriate action to alleviate the condition is to（）.A
change courseB
slow downC
heave toD
adjust tow line length
考题
单选题Which will NOT reduce yawing of a tow?（）A
Increasing the length of the towing hawserB
Trimming the tow by the bowC
Trimming the tow by the sternD
Drogues put over the stern
考题
单选题A chain bridle is preferable to a wire rope towing bridle on a long ocean tow because chain（）.A
is more flexible and has the ability to absorb shock because of its weightB
is less subject to wear and damage from abrasionC
requires little maintenanceD
All of the above
考题
单选题A tow astern is veering from side to side on its towline. The best way of controlling the action is to（）.A
trim the tow by the bowB
trim the tow by the sternC
list the tow to windwardD
adjust the length of the towing bridle
考题
单选题To reduce stress on the towing hawser when towing astern (ocean tow)，the hawser should be （）.A
secured to the aftermost fitting on the towing vesselB
just touching the waterC
underwaterD
as short as possible
考题
单选题As seen from the tow，what should connect the leading ends of both towing bridle legs to the main towing hawser?（）A
A cable clampB
A fishplate，flounder，or towing plateC
A pad eyeD
The towing bitts
考题
单选题Which statement concerning an automatic towing engine is FALSE? （）A
It automatically maintains tow line tensionB
It prolongs the life of the hawser by distributing chafing as the hawser is paid out and taken inC
As tension on the hawser increases，more line is taken in by the automatic towing engineD
As tension on the hawser decreases，more line is taken in by the automatic towing engine
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